Bed-motion for printing-presses.



W. K. HODGMAN.

BED MOTION FOB PRINTING PRESSES.

APPLIOATION FILED 11u12, 1910.

1,066,412. Patented July l, 1913.

5 SHEETS-SHEET 1.

W. K. HODGMAN.

BBD MOTION FOR PRINTING PRESSES.

APPLICATION FILED MAYIZ, 1910.

Patented July'l, 1913.

5 SHEETS-SHEET 2.

\. l 4 1 L 4 r L Iunvevtor .f wills il: H0

W. K. HODGMAN.

BBB MOTION P011 PRINTING PRESSES.

APPLICATION FILED MAY 12, 1910.

Patented July 1,1913.

5 saura-SHEET a.

Invezvtor willi@ .Hom f WyJ/JHw /f only@ witnesses wfvwi. Mm 2.524%

W. K. HODGMAN. BBD MoTroN wn PRINTING PRESSES.

APPLICATION FILED MAY 12, 1910.

Patented July 1, 1913.

5 SHEETB-SHEET 4.

|||||||||| g i I -i -lwmwunmmmif T P V Tlilwwwmmw` E /vQ/Nf IV Nw,

| 1 l l o. .HMA .YMNN

ivi/blesse@ W K HODGMAN BED MOTION FOB PRINTING PRESSES.

APPLICATION FILED MAY 12, 1910. 1,066,41 2, Patented July 1, 1913.

5 SHEETS-SHEET 5 Invert/tor.'

llfil lia 7i .H0dgnan UNITED STATES vPi/ XTENT OFFICE.

WILLISK. HODGMAN, O F .TAUNTON, MASSACHUSETTS, ASSIGNOR T HUBER HODG- MAN PRINTING PRESS CO., 0F TANTON, MASSACHUSETTS. A CORPORATION OF :MASSACHUSETTS To Aall irhom may con cern.

Be it known that I, ll'iLLis K. Hoooiiax, a citizen of the United States, and a resident of Tauntoiuii-i the` county of Bristol and State of ).lassachusett's. have invented an Improvement in Bed-Motions for PrintingvHall. .\'o[911.t98 A In order that the principles of the inve-nf tion may be fully apparent, I have herein- Presses'of which vthe following description, in connection with the accompanying.drawings. is a speciicatioinlike letterson thev disclosed for illustrative purposes one type or c-m'bodiment'of the invention in 'thenccoinpanying drawings, 'it being' understood thatY the inventionvmaj" be carried out by other embodiments thereof and by mecha! nism widely differing from that herein se'- lected for illustration.V Having reference Ato that type of the invention -herein illustrated, l\`igure I is a view. partly in vertical section and partly in .end elevation, ofv'a' printingl 'press embodying my invention: Figi? isa longitudinal vertical section of' the printing =press shown i detail pertainingto that forni/of press' in Fig. 1;-Fig. 3

upper rack of the bed' plate; Fig. I is a view similar'to Fig-f2 of a slightly modified form of the invention; Fig. 4 is a shown in Fig. 4; Fig. 5 is a plan view of that torni of myjpress shown in F ig. 4. but 'representing only the reversingmechanism;

and Fig. 6 is a vertical sectional view of that.A form' of my invention shown in Fig.' at.

mentof the invention herein chosen for the illustration, theA bed of the printing press is indicated at l, such bed being constructed in specification of Letters Patent.

is al plan view of certain parts embodying -tlie invention'beneath the Having vreference to that. type o r-einbodi# `BED-IVIOTION FOR PRINTING-PRESSES.

i Patented J uly 1 1913.

Apiiiicaiion :lied May 1'2, 1910. serial Nq. 560,804.

any suitable manner, and operatively con` nected to mechanism to-caiise the continuously and uniformly running driving shaft. first, to propel the bed continuously and atuniform speed .in one direction, and

then to propel the bed continuously and :it

uniform speed in the opposite directioinand also to provide for the reversal movei'nent of the bed at the end of its continuous and uniform movement in I one direction, by gradually slowing down said movement. until the bed is brought to rest, and then gradually accelerating 'its movement. in the opposite direction u'ntil it acquires the speed of its uniforinstrolte. I

'In the usual .operation of a printing press of the lied and cylinder type. the printing. bed carrying the printing surface is reciprocated in -the manner abovestated, the periphery vof the. cylinder and paper thereon traveling in the printing operation at .the same surface speed as the printing surface onthe bed.' so that. the paper is pressed against the printing surface with Aa rolling'action and without anyslipv -f lone surface relative to the other along the line .of contact between the cylinder and printing surface. In this type 'of'press the impression is commonly taken only'- in the travel of 'the bed in' one direction under the' :c vliiider, which continues to run in the same direction all the time that the press is in operation. and after the bed has made its fcrivard and working niovementor stroke under the cylinder the-bed must. be returned past the cylinder to the starting point preparatoiv.V for another working stroke. In the return movement of the bed the cylinder is commonly raised a little; so that its surface is entirely above and clear of the printing surface on the bed. which is,

.now traveling in an opposite. direction to the surface of the cylinder, which thus makes an idle revolution during the return or noneworlting' stroke of the bed.

Generali siealtin T thel mechanism for:

driving the bed of such'type of printing presses comprises a continuously rotation toothed gear and two racks connected with Ythe .printing bedso as to be positioned adjacent opposite edges of the gear. and means to cause engagement of 'one of the racl-:s with said gear, to produce the principal part of aV stroke in onefdirection, and'ao cause the engagement of'the other rack with the gear, to lproduce thejfpriiicipal part of the strokeinv the.otlier direction, the-bed commonly ruiming at uniform speed throughout the part of its stroke affected by the rack .and gear, this being the saine as the surface speed-of the cylinder during the stroke. Vhen the bedi arrives at the end of' such rack land vgear movement, itl co-mes un'- der the Control of another part ofthe bed motioii which mayl be termed the reversiis ment beyond the rack traveling. movement, and to`start the Al'iediirrthe reverse direction and bring it. tothe v velocity/.of the rack driven movementbythe time that the secondrack' arrives .at and cornes into engagevment with the gear, .at which time the reversingmechanism gives up control andthe bed is .again drivenby the -rack andV gear.A

movement to the Apoi-nt near the other end of its stroke,^'.where the reversing .mechas nism l'again takes control and performs. av

similar reversal of the movement of the bed vtothait just described. YThat is :to say, the reversing mechanism is designed to take Ithe .bedat fulllworking speed, reduce itsv .ve-V

locity vby graduall diminution, lfl'ntil .it is' stopped. vamd then moie 'it' in the opposite' directiorrfwith av gradual acceleration until same vertical plane an'd the-gear may be shifted verticallfyr ito'- engage the :racks Yin' valternationfor the racks may bef opposed in different vertical'pl'anes and the gear be ,shifted :laterally from engagement-with onerack tof engagement with the other, .or the relative movement may be accomplished by maintainingthe gear stationary and bringin g the. racksl alternately into engagement therewith by vertical' or lateral movement..

The racks and gear may be otherwise-opposed orl arranged to accomplish the saine result.

My inventionis'applicable to a gear and" f l i rack mechanism wherein the relative movement of said gear and racksis-accomplished in any of the above indicated ways or in any vther desired manner. l

n impression cyliiid'eris. indicated at 2,

. said cylinder being driven in vany preferred manner (see Fig. '1) 'as by a gear 3 atone end thereof vmeshing with a gear 4 upon a' reversing shaft 5 mounted in lsuitable bearings 6, 6' in the framework ofl t-he machine.

Printing press frameworks have heretofore been provided .with a series of tracksv L or ways to rcceivelthe bed of the press.

mechanism, and which acts to bring the 'to a stop at. the end of al shortl move-5 km'anner stated, to'make'it li'ghte'r becauseI -into working relation with the These tracks .or lways have --usually been four in number, such, for example, asindicated in said Iatent No. 911,498, vthe two outer tracks being located at a point' soniewhat removed from the lateral edges vof said I bed as tlierein'indicated. AThe impression cylinder 2 is provided asV usual-at its ends with bearers 7 7 and the bed is provided at its lateral edges with bearers 8'-.8 with- Y' Vwhich the bearers '7 7 contactwduring'the printing, thereby toV steady the parts and .aid 4in the'printing operation.. Heretofore so. far vas I ain aware 'the A'outer tracks or ways have been placed substantially inside vertical lines passing throughasaid bearers with the result that there has been a downi .i y

ward' strainupon the bed platebeyond said outside tracks orwa-ys, resulting -in a. tendency 'ofthe bedv plate` 'to AV'kle up at the center. This has been---foundto be' a serious objection` and has impaired the effectiveness esA of printing. presses as4 heretofore:construct@. i

ed. In accordancewith.myinvention Ipo-. sition tracksfor ways 9-f9 vertically inline with or substantially vertically: inline .with

the said 'bearers or with the ends of the iinpression vcylinder. j, .In addition to Ythese tracks Aor .ways I preferablyl prov-ide others and have hereinlrepresented-a*central track -or way 10- andialsofftracks or Waysfll-ll .between vthe central andthfouterft-racls or s ways,.a`s clearly'indic'atedlinFig. 1.

l. Preferably I 4provi'defsets `of rollersf12 connection with each tracker way'. v By 'posi- 'tioning the side tracks vas vdescribed .and'by providing' the central track 1 0, the beds A"effectivelyl supported at its extreme" edges 1 and in the middle. I am 'enabledbyreason of the factthat the bed is supported inthe have eliminated 'the tendency to upward buckling at thecenter while resisting the downward strains at thev edges. In other words, presses heretofore constructed have been provided with beds of unecessa'rythickness or weight, ini order to reduce the tenden'cy to upward' buckling,towhicli 'I have referred. The lower face of' the bed plate v1' is provided,as' indicated iii'Figs. l and 2, with .an upper rack 13 and a lower rack A1l herein shown as facingeacli other 'and out. of vertical alii-lenient. 'Ihese'racks receive between them two pinions 15, 1G adapted respectively to mesh with the racks 13 and lat' at the proper time. Both of these racks are positioned abovethe Areversing sha-ft. o. Since in the present type of the invention the racks are shown.as'stationary'and the relative movementbetween the pinion o i pinions and racks is'lobtained 'by vshifting movement of the pinions, the; said pinioiis areso shifted as to be brought alternately i upperand lower'racks. l

By locating both racks above therevcrsingshaft 5, t-he weight of the press is largely reduce-das compared with vvthose wherein-the flowerrack is arranged below the reversing gear, as iii such presses an increased length 'of parts is required to support the lower ''r'ack. In the printing presses of the type herein shown' .a compactness of structure is. secured'. `By supporting botliiacks above the reversing shaft'it is possible not only 'greatly to diminish tlieve'rt-ical length of the parts required -for the support ofthe lower rack, but the said supports may bemore lightly constructed, -while still securing a i {ii-'m andv elfective positioningfor said parts.-

Since in the present type of the invention the lower rack is located above the reversing shaft, and inasmuch as the racksare preferably arranged with their teeth facing each other, said racksar'e `not engaged by a gear directly mounted upon the reversing-'shaft but by mechanism receiving vmotion from.

the said reversing shaft and herein embodied of a le've-r 26 p ivoted upon asuitable bracket 27 depending from'theframing. *The upin thepinions 15 and 16. .Vhile such-mechanism may be of any desired type, I have herein show-n the reversing shaft as prosuitably' supported-in' the framing and lng thereon a'suitable Vcani Q5 with the 'trackv whereof engages a'roller -upon the lower arm-4 40 per arm of said lever is provided with a projection 28 to enter between the pinions 15 and 1G, so as at the proper-time to shift said pinions, thereby to. drive either the rack 13v or the rack 14. The said pinio'ns-are rigidly connected or integral, and are loose upon the .stud 29 bolted to one of the tracks 11,.

whereby 'they may-be slid as indicated into mesh with the respective racks. 'Ilhepinion not in engagement-withA a rack is shiftedv gear 17 as indicated in Fig. 1.

Bearing the engagement ofeithe'rpinion. 15 or 16 with the racks 13 and lt-th'ebedof the press isdriven at a uniform speed in one direction or the otherf Asthe bed nears itslimit `of movement `in "either direction, mechanism is brought into play'to controi movement of the bed during'the described. .shifting of .said pinions 15.16,'such mechanis-m preferably being such as to receive the flied at its-full speed of movement, gradually to diminish such rate of speed untiltl'iebed brought to a stop andthen to drive the bed in the opposite direction ata. gradualiy 1s-shown the "saidsolidly supported.

increasing speed until the wor-king speed the bed'is reached, at which time the bed I is again brought under the control of pinions 15, 16.

Iii order to'coiitrol the bedduring the described shifting'of the Vpinions 15 and 16, I have indicated for that purpose in that form of myinveiition' shown in Figs. 1., 2

and-3 reversing gears 30, 3.1, as shown 'in Figs. 2 and, mounted respectivelyiii the outer forked ends ofa slide bar or member- -3'2 having a cross head 33,v shown most clearly iirF ig.' 1, and receiving therein the cross head block 3l pioj'ecting'lfrom the cranlcai'm or primary reversing elementI 35 fast. on and preferably forged or otherwise integral with-*the reversing shaft f5. By forming said crank armintegrally with said reversingr shaft; the 'said 'crank arm and therefore -th'e slideA bar.3'2 move' exactly iii 'unison with the reversing shaft 5g which might not be the case were the said crank arm ine-rely iteved to the reversing` shaftas iic-w customary. f

Viewing F ig. 1, it will be vapparentthat the bearing 6 for the reversing shaft 5. is positioned between the bearing G 'andthe -s positioned between the bed ref :iprocatin'g 'gear land said crossh'ea-d and-also pre-fer-` ably Avertically or substantially vertically in liiie, withthe central --track orway. -10.

Owing to t-he `tacftgtliat the crank -arni 35 isv preferably integral? -v'vit-li'ltlie reversing,

shaft 5, thebearing' located as described and L moreover bypositioning said, bearing reversing-shaft is more lcd The maar forked-'aids bf the Slide barbe member 32 .provide movable fulcraflfor, 'the gear's, 3() ,v 31, whih'- are constantly in 'recipg recati-ng m'esh with andare;rtatedby'rst-a-- Y tionary reversing racks 32X; 33?, suitably -moiinted upon the fram'i-ng ,0f the press, 'as

indicated in Figs. 2 and 3. Theouter .ends of the slidefbaror member 32-aredown turned-and engage with suitable ways 34 at "'either side of t-he racks 32. 33 as indicated vrin Fig 2, thereby to 'steadyfthe movement of said slide bar-.UV into engagement with 'the bed'reciprocating.i

As indicated in Figs. 1 vandi-little bed vof -the press'is provided with av short, down.

Wardly--facing, rev-ersingfrack 36,' with 3.6 is brought-.into engagement with the reversing 'gear 3 1, at which vtim'e the` shifting movementof the;A pinions15,`16 commences, the said gear 31 being rotated because 'of its Aviro iis mesh-ing engagement- -w-ith/the frame reveisfingrack 33. andthecrankaarm connection aunconnec'tionl is such thitunder the con? lt1onary racks 32", 33, and adapted altersaid lied to the right is gradually reduced to zero and is then gradually augmented. in the opposite directon until the full working speed of the 'bed has been secured, at

which time the pinins 15, 16' have been.

shifted to bring them into driving relation .with tlie'other rack, the bed then passing from the control of the gear 31 to that of said Vpinions 15, 16. "As the bed nears the end of its movement in the opposite direction, a similaroperaton occurs through the instrumentalityof t el bed reversing rack' 36, frame reversing rack 3Q and the gear 30. vln Figs. 1, 2 and 3, I have indicated two reversing gears 80,31 in mesh with the stanately to engage the bed reversing rack 36.

In Figs. 4, 5 and. 6, I have shown a slightlyv modified form of .my invention, wherein' I employ a single reversing gear adapted-constantly to mesh with a singlestationary rel versing rack and-alternately toengage two bed reversing racks. As clearly s own in said figures, 'the slide bar' or member 37 is gniCed at. its left hand/end 38, viewing Fig.

'4, upon theA framing of the machine, the opposite end 'of said lslide bar being prefen' ably similarly vguided as shown in F ig.4, at 37, and having mounted thereon' thereversinggear'SS) having a-meshing engagement with the stationary reversing rack 40, upon which it is constantly reciprocated by reason of the crank arm 35 upon the reversing shaft 5 as previously described.v The bed- Q is provided with two short bed reversingracks 41, 42. 'hen the bed approaches the limit of its movement toward the left, viewing Fig. 4, the bed reversing rack `l2'is brought into vmesh with the' reversing gear 39, wherebyA the speed ofthe bed is gradually reduced to zero and its direction of 'movement reversed and .its'speed of movement increased *to full working speed. yhen the bed'll reaches the limit of its movement toward the right, viewing Fig. 4, the bed reversing rack' 4:1 engages the said reversing gear 39, thereby -again to reverse the direction of movement of said bed in the manner described The numb-er of teeth upon the gears 3 and 4 driving the impression cylinder, upon the bed racks 13 aiidlat, upon the pinions 15 and 1G therebetween, and upon he bed reciprocating gear 17 is such .that the said pinions l5 and 1G make a whole number of turns tov driving pinions -15 and 16. lVhile these proportions may be varied, it is important that 'for the reasons stated a complete number of turns of said lrack driving pinions 15 and 1-6 be -made during each complete cycle of lthe press.- l It will be apparent from the foregoing descriptionv that the press hereindescribed v is of simplified and lighter construction and that .although the bed of the press is o f re- V duced thickness and less weight,rit has no 'tendency to upward bucklingin 4the center. .Moreover the reversing mechanism is ofA simplified. construction, and is such as to 'secure a movement in unison Vof the various parts. I Having thus described onel specific einbodiment of my invention, I 4desire it to be understood that although specific terms are employed, they are used in a generic and descriptive sense Aand not for purposes of limitation, the scope *off the vinvention being set forth in thefollowingclaims.

.Claims- 1. A printing-press 'comprising in combination a reciprocable bed carrying a plurality of racks, an impression cylinder hav- *ing a gear, a reversing shaft located below said racks and having a gear meshing with said cylinder gear, an odd -number of benl tracks, one of'wliich is substantially central with respect to said bedand two, of which .are substantially beneath the extreme edges of th'ebed,ra bed reciprocating element. carone side of said central bed'track, a bed reversing element carried bythe reversing `shaft and locatedat the other side of the said 'central bed track, and a bearing Vfor reciprocating element and the bed reversing element. A

2.- A printiiig press comprising in combi nation a |reciprocable'bed,an impression c vlhaving cQ-acting bearers, reversing shaft' having a gear meshing with said cylinder gear. an odd number .of bed tracks, onev ofwliieh .is substantially7 central with-respect to the bed. and two of which are respectively 115 .substantially 'vertically under each of the bearers, a bed reciprocating gear carried by the .reversingl shaft and located at one side of said central track. and a primary reversing element carried by the reversing shaft 12o and located upon the other side of said central' track, said reversing shaft having a bearing located in substantially the vertical pla ne ofthe said central tra-ckand supporting the reversing` shaft between the bed recipro- 125 eating 'gear and the said primary reversing element. 3. A printing press having a reciprocable bed carrying opposed racks, a single bed reried by said 'reversing/.shaft and located at 100 the reversing shaft located between the bed 1.0.5,'

inderhaviug` a gear, said bed and cylinder ciprocating andA reversing shaft located be- 131.)l

gear, said reversing gear being adapted to y versing low said racks and carrying a bed reciproeating gear, rack driving means in mesh with said bedk reciprocating gear, shifting mechanism to shift said rack driving means into alternate engagement with said opposed racks, and a single bodilyV movable revers-v ing pinion operatively connected to said 'shaft and adapted periodically to be brought into driving relation to said bed to reverse the movement thereof at the end of each stroke. f

4. A printing press having a reciprocable bed carrying opposed racks and also adjacent opposite ends a pair of bed reversing racks` a single bed reciprocating and reshaftlccated below said racks` rack driving means oppositely rotated with respect to said bed reciprocating and reversing shaft, means'to impart. relative movement to said rack driving means and said opposed racks, a single reversing gear, a sliding inember carrying the saine, and means to impart to and fro movement to said sliding member from said reversing shaft, and a stationary rack mechanism to rotate said reversing be broughtalternately into engagement with said bed reversing racks.

5. A bed and cylinder printing press comprising in combination a reciprocable bed, an impression cylinder, said bed having an odd number of bed tracks, one of which is substantially central of said bed, a reversing shaft directly geared to said cylinder and having oneof its bearings adjacent said cylinder driving gear, and another bearing in substantially the vertical plane of said central track, a uniform motion bed driving Aelement and'a bed reversing element, said elements being fixed upon the reversing shaft upon opposite sides of the said central bearing.

6. A printing press comprising in combination a reciprocable bed carrying a plu rality of opposed racks and having bearers, an impression cylinder havinga gear, a reversing shaft located below said racks and having a gear directly. meshing with said cylinder gear, an odd number' of bed tracks,

two of which are substantially vertically be-,

neath the bearers of the-bed, and one of which is substantially central with respect to the bed, a `primary reversing element integral withisaid reversing shaft, and two bearings for said reversing shaft at the saine side of said primary reversi-ng element, and one of said bearings supporting the central bed track. y

7 A printing press'compi'ising in combination a reciprocable bed carrying a plurality of opposed racks, an impression cylinder having a gear, a reversing shaft located below said racks andlhaving a gear directly meshing with the cylinder gear, an

Odd number of bed tracks', two of which are substantially beneath the extreme edges .of

the bed, another of which is substantially Y cent-ral with respect to the bed, and one of stud shaft carried by said last enumerated..

bed track and having a pair of pinioiis vthereon to engage said racks, and a primary reversing element carried by said reversing sha ft and between said central bed track and the bed track most. remote from the cylinder inder having a gear, a gear 4 upon said re-4 versing shaft directly meshing with said cylinder gear, a driving shaft '20 having a pinionlt) thereon directly meshing with said gear 4, a primary reversing element integral with said' reversing shaft, a single bed reciprocating gear 17 upon the reversing shaft, a. stud shaft Q9, sliding pinions 15, 16 thereon adapted alternately to mesh with said bed reciprocating gear and said opposed racks, a cam shaft 94. and means operated from saidcam shaft for sliding said gears. l

S). A printing press comprising in coinbination a reciprocable bed carrying a plurality of opposed racks, an impression cylinder having a gear, a reversing shaft l0- cated below said racks. a gear 4 upon said reversing shaft, a driving shaft 20 having a pinion 19 thereon directly meshing with said gear 4, a primary reversing element integral Wit-h said reversing shaft, a single bed'reciprocating gear 17 upon the reversing shaft, an odd number of bed tracks of which one is substantially central with respect to the bed, two of which are substantially vertically beneath the extreme edges of the bed and onevof which is between said central bed track and the bed track nearest the cylinder geaiga stud shaft- 29 carried by said last enumerated bed track, slidingl pinions 15, 16 tl reon adapted to engage said racks and said bed reciprocating gear -17 and a plurality of bearings for said reversing shaft, all of the bearings for the reversing shaft being upon' the saine side of the primary reversing element.

10. A printing press comprising in coinbination a reciprocable bed carrying a plurality of opposed racks, an impression .cyl-

inder having a gear,4 a reversing shaft lo'- cated-below said racks and having a gear directly meshing with the cylinder gear. an odd number of bed tracks, two of which are substantially beneaththe extreme edges of the bed, another of which Ysubstantially central with respect to the bed. and one of which is between said centi-al bed track and that bed track nearest the cylinder gear, a stud shaft carried by said last enumerated vbed track and having gearing directly vmeshing with the cylinder gear, an

odd numberof bed tracks, twoof which are substantially beneath the extreme edges of .the bed, vanother of which is substantially central with respect; to the bed, and ,one of which is between said central bed 'track and 'that bed track nearest the cylinder gear, a

stud shaft carried by said last enumerated bed track and havin gearing thereon to engage said racks, an a primary reversing element carried by said reversing 'shaft and' between saidI central bed track and the bed track most remote' from the cylinder gears'.

12. A printing press comprising yin combination a reciprocable bed carrying a plurality'of opposed racks, an impression cyliiider having a gear, a reversing shaft, a gear 4 thereon directly meshing with said cyiinder gear, Aa driving shaft 20 having a pinion 19 thereon directly meshing with -said ge'ar 4, a primary reversing element iiitegral with said reversing shaft, a single bed reciprocating gear 17 upon the reversing shaft, a stud shafft 29, gearing thereon adapted to mesh with said bed reciprocating gear and alternately to mesh with said op posed racks, a cam shaft 24, and Vmeans operated-from said cam shaft for sliding said gearing.

13. A printing press comprising in combination a reciprocable bed carrying a plurality 0fopposed racks, an impression cylinder having a gear, a reversing shaft located below said racks, a gear .4 upon said reversing shaft, a driving shaft 20 having a pinion 19 thereon directly meshing with said gear 4, a primary reversing elementintegral with said reversing shaft, a single bed reciprocating gear 17-upon the reversing shaft, an odd number of bed tracks of ,A

which vone is substantially central with respect to the bed, two of which are substantially vertically beneath the extreme edges of the bed and one of which is between said central bed track and the bed track nearest 'the cylinder gear, a stud shaft 29 carried ment. V v

4In'testimony whereof, I have signed my name to this specification, in thev presence of two subscribing witnesses.' y

-' p l WILLIS K. HODGMAN.

Witnesses:

MAY H. LownY, ROBERT H. KAMMLER'. 

